<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>角色管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

        <!-- 卡片视图区 -->
    <el-card class="box-card">
      <!-- 按钮区 -->
      <el-row :gutter="20">
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

    <!-- 权限列表区 -->
        <el-table :data="roleslist" style="width: 100%" border stripe>
        <!-- 展开列 -->
          <el-table-column type="expand">
            <template slot-scope="scope">
                  <!-- <span>{{ props.row.roleName }}</span> -->
                  <!-- <pre>{{props.row}}</pre> -->
                  <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
                  v-for="(item1,i1) in scope.row.children" :key="item1.id">
                    <!-- 渲染一级权限 -->
                    <el-col :span="6">
                      <el-tag>{{item1.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 渲染二级和三级权限 -->
                    <el-col :span="18">
                      <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                       v-for="(item2,i2) in item1.children" :key="item2.id">
                        <el-col :span="6">
                          <el-tag type="success">{{item2.authName}}</el-tag>
                          <i class="el-icon-caret-right"></i>
                        </el-col>
                        <el-col :span="18">
                            <el-tag  closable @close="removeRightById(scope.row,item3.id)" type="warning" v-for="(item3) in item2.children" :key="item3.id">
                              {{item3.authName}}
                            </el-tag>
                        </el-col>
                      </el-row>
                    </el-col>
                  </el-row>
            </template>
          </el-table-column>
          <el-table-column type="index"></el-table-column>
          <el-table-column prop="roleName" label="角色名称"></el-table-column>
          <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
          <el-table-column label="操作">
            <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)" >编辑</el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRole(scope.row.id)" >删除</el-button>
                <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)" >分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
    </el-card>

    <!-- 添加角色的对话框 -->
    <el-dialog
        title="添加角色"
        :visible.sync="addDialogVisible"
        width="60%" @close='addDialogClose'>
        <!-- 内容区 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addUser" >确 定</el-button>
        </span>
    </el-dialog>

    <!-- 编辑角色的对话框 -->
        <el-dialog
        title="编辑角色"
        :visible.sync="editDialogVisible"
        width="50%" @close='editDialogClose'>
        <!-- 内容区 -->
        <el-form :model="editForm" :rules="addFormRules" ref="editFormRef" label-width="80px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRole" >确 定</el-button>
        </span>
    </el-dialog>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightdialogVisible"
      width="50%"
      @close="setRightdialogClose">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps"
       show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef">
       </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightdialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  name: 'roles',
  data () {
    return {
      roleslist: [],
      // 控制添加角色对话框显示与隐藏
      addDialogVisible: false,
      // 添加角色参数
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 2, max: 10, message: '角色名称长度在3-10个字符之间', trigger: 'blur' }
        ]
        // roleDesc: [
        //   { required: true, message: '请输入角色名称', trigger: 'blur' },
        //   { min: 2, max: 10, message: '角色名称长度在3-10个字符之间', trigger: 'blur' }
        // ]
      },
      // 控制编辑角色对话框显示与隐藏
      editDialogVisible: false,
      // 编辑角色参数
      editForm: {},
      // 控制分配权限对话框的显示与隐藏
      setRightdialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 树形控件默认选中的节点
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取角色列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败')
      this.roleslist = res.data
      this.$message.success('获取角色列表成功')
    },
    // 添加对话框关闭时 清空表单
    addDialogClose () {
      this.$refs.addFormRef.resetFields()
    },
    // 添加用户 提交
    addUser () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('roles', this.addForm)
        // console.log(res)
        if (res.meta.status !== 201) return this.$message.error('添加角色失败')
        this.getRolesList()
        this.addDialogVisible = false
        this.$message.success('添加角色成功')
      })
    },
    // 删除角色
    async removeRole (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // console.log('确认删除')
      const { data: res } = await this.$http.delete(`roles/${id}`)
      if (res.meta.status !== 200) return this.$message.error('删除失败')
      this.getRolesList()
      this.$message.success('删除用户成功')
    },
    // 编辑对话框关闭时 清空表单
    editDialogClose () {
      this.$refs.editFormRef.resetFields()
    },
    // 显示编辑对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get(`roles/${id}`)
      // console.log(res)
      if (res.meta.status !== 200) return this.$message.error('查询角色失败')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 提交编辑
    editRole () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(`roles/${this.editForm.roleId}`, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
        // console.log(res)
        if (res.meta.status !== 200) return this.$message.error('修改角色失败')
        this.editDialogVisible = false
        this.getRolesList()
        this.$message.success('修改角色成功')
      })
    },
    // 删除角色中的三级权限
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) return this.$message.error('删除权限失败')
      // this.getRolesList()
      role.children = res.data
      this.$message.success('删除权限成功')
    },
    // 展示分配权限对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // console.log(role)
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限数据失败')
      this.rightslist = res.data
      // console.log(this.rightslist)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      // console.log(this.defKeys)
      this.setRightdialogVisible = true
    },

    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys (node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听 分配权限对话框关闭事件
    setRightdialogClose () {
      this.defKeys = []
    },
    // 分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) return this.$message.error('分配权限失败')
      this.$message.success('分配权限成功')
      this.setRightdialogVisible = false
      this.getRolesList()
    }
  }
}
</script>

<style lang="less" scoped>
  .el-tag{
    margin: 7px;
  }
  .bdtop{
    border-top: 1px solid #eee;
  }
  .bdbottom{
    border-bottom: 1px solid #eee;
  }
  .vcenter{
    display: flex;
    align-items: center;
  }

</style>
